EP2026025A1 - Process and device for producing high pressure nitrogen by cryogenic separation of air in a single column - Google Patents
Process and device for producing high pressure nitrogen by cryogenic separation of air in a single column Download PDFInfo
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- EP2026025A1 EP2026025A1 EP08012055A EP08012055A EP2026025A1 EP 2026025 A1 EP2026025 A1 EP 2026025A1 EP 08012055 A EP08012055 A EP 08012055A EP 08012055 A EP08012055 A EP 08012055A EP 2026025 A1 EP2026025 A1 EP 2026025A1
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- single column
- condenser
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- top condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04624—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using integrated mass and heat exchange, so-called non-adiabatic rectification, e.g. dephlegmator, reflux exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/02—Processes or apparatus using separation by rectification in a single pressure main column system
Definitions
- the invention relates to a method according to the preamble of patent claim 1.
- the "HWT” serves for cooling of feed air and may be formed by a single heat exchanger block or by a plurality of heat exchanger blocks.
- the top condenser is designed as a separate heat exchanger, in particular as at least one plate heat exchanger block, most preferably as a single plate heat exchanger block.
- single column is meant here a separating device whose rectification zone (s) are operated essentially under the same pressure. It is usually formed by a one-piece column, but can also be formed by a two- or multi-part column.
- the single column has a top condenser. This is designed as a condenser-evaporator and thus has liquefaction and evaporation passages.
- a head gas of the crude argon column is introduced into the liquefaction passages where it is at least partially condensed.
- a liquid cooling fluid is introduced into the evaporation passages of the top condenser and there at least partially evaporated.
- the invention has for its object to provide a method of the type mentioned above and a corresponding device, which are economically particularly favorable to operate by an increased product yield, a higher Have product purity, lower operating costs and / or lower investment costs.
- top condenser is designed as a reflux condenser and top gas of the single column is introduced into the return passages of the reflux condenser.
- lux condenser also called dephlegmator
- dephlegmator a heat exchanger having return passages. These return passages are supplied with steam from below (here: top gas of the single column). This condenses at least partially when ascending in the return passages.
- the return passages are designed so that the condensed liquid is not entrained, but flows down. Due to the countercurrent of vapor and liquid, a rectification takes place in the return passages.
- the condensate, which exits at the lower end, is enriched in less volatile components, the steam exiting overhead is more volatile.
- the heat exchanger block (or even a plurality of heat exchanger blocks) may be arranged inside a pressure vessel, as described, for example, in US Pat EP 1189000 A2 is shown, or the heat exchanger block is completed on all sides by headers, see for example US 6128920 .
- the reflux condenser in the head of a separation column here: the single column
- the return passages are at its lower end in communication with the upper region of the separation column, see German patent application 102006037058 and corresponding applications.
- the retrace capacitor can also according to one of the embodiments of the concurrently filed German patent application 102007035619.8 and the corresponding applications.
- the one or more heat exchanger blocks of the reflux condenser are preferably designed as a plate heat exchanger, in particular as a brazed aluminum plate heat exchanger.
- a reflux condenser not only allows heat exchange, but also mass transfer between the gas rising in the return passages and the liquid flowing down there, similar to the corrugated packings of a mass transfer column. This release effect can be expressed as the HETP value (Height Equivalent to One Theoretical Plate).
- the HETP value of the capacitor is in the range of 300 to 600 mm. Thus, for example, a 1.5 m high reflux condenser works up to five theoretical plates.
- Such capacitors are regularly designed as a condenser-evaporator. Against the condensing on the liquefaction side (return passages) head gas thus a cooling fluid is evaporated on the evaporation side.
- the heat exchanger block is usually arranged in a bath. Because of the hydrostatic pressure, the temperature in the evaporation passages rises from top to bottom.
- the gas flowing upwards in the return passages becomes increasingly richer in components which are more volatile than nitrogen and coldest at the top of the condenser.
- the temperature profile in the return passages adapts to those of the liquefaction passages.
- the return condenser creates a natural tendency for a driving temperature gradient which remains almost constant over the entire block height.
- the driving temperature gradient in the lower condenser area is always smaller than in the upper area. This weakens the contribution of the heating surface located in the lower part of the condenser to the total heat exchange.
- the Temperature difference goes to zero and a portion of the heating surface is ineffective.
- the temperature difference between evaporation and liquefaction passages is substantially constant.
- the exchange area can be reduced accordingly and thus the investment costs can be reduced.
- the cooling fluid in the upward direction through the evaporation passages is directed ("forced flow" evaporator). This in turn results in a particularly favorable course of the temperatures of evaporating cooling fluid and condensing overhead gas over the height of the top condenser.
- the cooling fluid is formed by an oxygen-enriched fraction from the lower portion of the single column.
- the invention also relates to a device according to claim 5.
- Atmospheric air 1 is introduced after compression, cleaning and cooling (not shown) under an absolute pressure of 5 to 10 bar, preferably about 6 bar in the single column 2 immediately above the bottom.
- the top condenser 3 of the single column 2 is designed according to the invention as a reflux condenser. It consists in the example of a single plate heat exchanger block. Nitrogen-rich gas from the head of the single column flows down into the return passages (arrow up) and is partially condensed there. The condensate generated in this way flows in countercurrent to the rising gas the return passages down (arrow down) and is used in the single column 2 as a liquid return. (A part can be removed as required as a liquid product.) The gaseous remaining fraction is withdrawn at the upper end of the return passages on a side header 4 as pressure nitrogen stream 5 and recovered after warming in a main heat exchanger, not shown as pressure nitrogen product.
- An oxygen-enriched fraction 6 is discharged liquid from the bottom of the single column, expanded in a throttle valve to a pressure of 1.5 to 4.0 bar, preferably about 2.5 bar and introduced via a side lower header 8 in the evaporation passages of the top condenser 3, which are operated as a forced flow evaporator.
- the completely vaporized oxygen-rich fraction 10 is withdrawn via an upper header 9 from the evaporation passages and can be expanded, for example in a residual gas turbine (not shown) to perform work. After heating in the main heat exchanger (not shown) it is withdrawn as a residual stream, used for regeneration of an adsorber for air purification or used as an oxygen-enriched product.
- the top condenser can be formed in the inventive method on the evaporation side as a falling film evaporator or as a liquid bath evaporator (see German patent application 102006037058 and corresponding applications or simultaneously filed German patent application 102007035619 , and corresponding applications).
- a reflux condenser in one of the embodiments mentioned herein can also be used as the top condenser of a column of a two or more column nitrogen-oxygen separation process, for example as the main condenser of a classic double column.
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- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method according to the preamble of patent claim 1.
Einzelsäulen-Verfahren und Vorrichtungen zur Tieftemperaturzerlegung von Luft sind zum Beispiel aus Hausen/Linde, Tieftemperaturtechnik, 2. Auflage 1985, Kapitel 4 (Seiten 281 bis 337) bekannt. Zusätzlich zu der Einzelsäule zur Stickstoff-Sauerstoff-Trennung können in dem Verfahren weitere Schritte zur Gewinnung anderer Luftkomponenten vorgesehen sein, insbesondere von Edelgasen.Single-column methods and apparatuses for the cryogenic separation of air are known, for example, from Hausen / Linde, Tiefftemperaturtechnik, 2nd edition 1985, Chapter 4 (pages 281 to 337). In addition to the single column for nitrogen-oxygen separation, further steps for obtaining other air components, in particular noble gases, may be provided in the method.
Der "HWT" dient zur Abkühlung von Einsatzluft und kann durch einen einzelnen Wärmetauscherblock oder auch durch eine Mehrzahl von Wärmetauscherblöcken gebildet sein. Der Kopfkondensator ist als hiervon getrennter Wärmetauscher ausgeführt, insbesondere als mindestens ein Plattenwärmetauscherblock, höchst vorzugsweise als ein einziger Plattenwärmetauscherblock.The "HWT" serves for cooling of feed air and may be formed by a single heat exchanger block or by a plurality of heat exchanger blocks. The top condenser is designed as a separate heat exchanger, in particular as at least one plate heat exchanger block, most preferably as a single plate heat exchanger block.
Unter "Einzelsäule" wird hier eine Trenneinrichtung verstanden, deren Rektifizierzone(n) im Wesentlichen unter demselben Druck betrieben werden. Sie wird in der Regel durch einen einteilige Säule gebildet, kann aber auch durch eine zwei-oder mehrteilige Säulegebildet sein.By "single column" is meant here a separating device whose rectification zone (s) are operated essentially under the same pressure. It is usually formed by a one-piece column, but can also be formed by a two- or multi-part column.
Die Einzelsäule weist einen Kopfkondensator auf. Dieser ist als Kondensator-Verdampfer ausgebildet und weist damit Verflüssigungs- und Verdampfungspassagen auf. Ein Kopf gas der Rohargonsäule wird in die Verflüssigungspassagen eingeleitet und dort mindestens teilweise kondensiert. Ein flüssiges Kühlfluid wird in die Verdampfungspassagen des Kopfkondensators eingeleitet und dort mindestens teilweise verdampft.The single column has a top condenser. This is designed as a condenser-evaporator and thus has liquefaction and evaporation passages. A head gas of the crude argon column is introduced into the liquefaction passages where it is at least partially condensed. A liquid cooling fluid is introduced into the evaporation passages of the top condenser and there at least partially evaporated.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art und eine entsprechende Vorrichtung anzugeben, die wirtschaftlich besonders günstig zu betreiben sind, indem sie eine erhöhte Produktsausbeute, eine höhere Produktreinheit, geringere Betriebskosten und/oder geringere Investitionskosten aufweisen.The invention has for its object to provide a method of the type mentioned above and a corresponding device, which are economically particularly favorable to operate by an increased product yield, a higher Have product purity, lower operating costs and / or lower investment costs.
Diese Aufgabe wird dadurch gelöst, dass der der Kopfkondensator als Rücklaufkondensator ausgebildet ist und Kopfgas der Einzelsäule in die Rücklaufpassagen des Rücklaufkondensators eingeleitet wird.This object is achieved in that the top condenser is designed as a reflux condenser and top gas of the single column is introduced into the return passages of the reflux condenser.
Unter "Rücklaufkondensator" (auch Dephlegmator genannt) wird hier ein Wärmetauscher verstanden, der Rücklaufpassagen aufweist. Diese Rücklaufpassagen werden von unten mit Dampf (hier: Kopfgas der Einzelsäule) beaufschlagt. Dieser kondensiert beim Aufsteigen in den Rücklaufpassagen mindestens teilweise. Die Rücklaufpassagen sind dabei so konstruiert, dass die kondensierte Flüssigkeit nicht mitgerissen wird, sondern nach unten fließt. Durch den Gegenstrom von Dampf und Flüssigkeit findet in den Rücklaufpassagen eine Rektifikation statt. Das Kondensat, das am unteren Ende austritt, ist an schwererflüchtigen Komponenten angereichert, der oben austretende Dampf an leichterflüchtigen.Under "reflux condenser" (also called dephlegmator) is here understood a heat exchanger having return passages. These return passages are supplied with steam from below (here: top gas of the single column). This condenses at least partially when ascending in the return passages. The return passages are designed so that the condensed liquid is not entrained, but flows down. Due to the countercurrent of vapor and liquid, a rectification takes place in the return passages. The condensate, which exits at the lower end, is enriched in less volatile components, the steam exiting overhead is more volatile.
Es sind verschiedene Bauformen von Rücklaufkondensatoren bekannt. Der Wärmetauscherblock (oder auch eine Mehrzahl von Wärmetauscherblöcken) kann im Inneren eines Druckbehälters angeordnet sein, wie dies zum Beispiel in
Räumliche Begriffe wie "oben", "unten", "seitlich" etc. beziehen sich hier immer auf die Orientierung der Einzelsäule und des Rücklaufkondensators im bestimmungsgemäßen Betrieb.Spatial terms such as "top", "bottom", "side", etc. always refer to the orientation of the single column and the reflux condenser in normal operation.
Ein Rücklaufkondensator ermöglicht nicht nur einen Wärmeaustausch, sondern auch einen Stoffaustausch zwischen dem in den Rücklaufpassagen aufsteigenden Gas und der dort nach unten fließenden Flüssigkeit, ähnlich wie die geriffelten Packungen einer Stoffaustauschsäule. Diese Trennwirkung kann als HETP-Wert (Height Equivalent to One Theoretical Plate = Höhe eines theoretischen Bodens) angegeben. Der HETP-Wert des Kondensators liegt im Bereich von 300 bis 600 mm. Damit wirkt zum Beispiel ein 1,5 m hoher Rücklaufkondensator etwa bis zu fünf theoretische Böden.A reflux condenser not only allows heat exchange, but also mass transfer between the gas rising in the return passages and the liquid flowing down there, similar to the corrugated packings of a mass transfer column. This release effect can be expressed as the HETP value (Height Equivalent to One Theoretical Plate). The HETP value of the capacitor is in the range of 300 to 600 mm. Thus, for example, a 1.5 m high reflux condenser works up to five theoretical plates.
Allerdings wirkt sich am Kopf der Einzelsäule dieser Effekt nur geringfügig auf die Stickstoff-Sauerstoff-Trennung aus, das heißt der Einsatz des Rücklaufkondensators spart keine Stoffaustauschelemente (praktische Böden, geordnete Packung oder ungeordnete Füllkörper) in der Einzelsäule. Bisher wurde also kein Grund gesehen, in Einzelsäulen-Verfahren einen Rücklaufkondensator als Kopfkondensator einzusetzen.However, this effect has only a slight effect on the nitrogen-oxygen separation at the top of the single column, ie the use of the reflux condenser does not save any mass transfer elements (practical trays, ordered packing or disordered packing) in the single column. So far no reason was seen to use a reflux condenser as a head capacitor in single-column process.
Im Rahmen der Erfindung hat sich jedoch herausgestellt, dass der Einsatz eines solchen Rücklaufkondensators am Kopf der Einzelsäule einen weiteren Vorteil aufweist. Solche Kondensatoren sind regelmäßig als Kondensator-Verdampfer ausgeführt. Gegen das auf der Verflüssigungsseite (Rücklaufpassagen) kondensierende Kopfgas wird also auf der Verdampfungsseite ein Kühlfluid verdampft. Der Wärmetauscherblock ist üblicherweise in einem Bad angeordnet. Wegen des hydrostatischen Drucks steigt die Temperatur in den Verdampfungspassagen von oben nach unten an.In the context of the invention, however, it has been found that the use of such a reflux condenser at the head of the single column has a further advantage. Such capacitors are regularly designed as a condenser-evaporator. Against the condensing on the liquefaction side (return passages) head gas thus a cooling fluid is evaporated on the evaporation side. The heat exchanger block is usually arranged in a bath. Because of the hydrostatic pressure, the temperature in the evaporation passages rises from top to bottom.
Durch die Trennwirkung des Rücklaufkondensators am Kopf der Einzelsäule wird das in den Rücklaufpassagen nach oben strömende Gas zunehmend reicher an leichter als Stickstoff flüchtigen Komponenten und ist am Kopf des Kondensators am kältesten. Damit passt sich der Temperaturverlauf in den Rücklaufpassagen an denjenigen der Verflüssigungspassagen an. Auf diese Weise entsteht beim Rücklaufkondensator eine natürliche Tendenz zu einem über die gesamte Blockhöhe fast gleich bleibenden treibenden Temperaturgefälle. Beim konventionellen Kopfkondensator, der von oben nach unten durchströmt wird, ist dagegen das treibende Temperaturgefälle im unteren Kondensatorbereich immer kleiner als im oberen Bereich. Dies schwächt den Beitrag der im unteren Kondensatorteil befindlichen Heizfläche am gesamten Wärmeaustausch. Dies wirkt sich besonders in Unterlastfällen aus, sodass die Temperaturdifferenz gegen Null geht und ein Teil der Heizfläche unwirksam wird. Bei dem erfindungsgemäßen Verfahren ist dagegen die Temperaturdifferenz zwischen Verdampfungs- und Verflüssigungspassagen im Wesentlichen konstant. Damit kann die Austauschfläche entsprechend verkleinert und damit die Investitionskosten verringert werden.Due to the separating effect of the reflux condenser at the top of the single column, the gas flowing upwards in the return passages becomes increasingly richer in components which are more volatile than nitrogen and coldest at the top of the condenser. Thus, the temperature profile in the return passages adapts to those of the liquefaction passages. In this way, the return condenser creates a natural tendency for a driving temperature gradient which remains almost constant over the entire block height. In contrast, in the case of the conventional top condenser, which flows through from top to bottom, the driving temperature gradient in the lower condenser area is always smaller than in the upper area. This weakens the contribution of the heating surface located in the lower part of the condenser to the total heat exchange. This is particularly noticeable in under load situations, so that the Temperature difference goes to zero and a portion of the heating surface is ineffective. In contrast, in the method according to the invention, the temperature difference between evaporation and liquefaction passages is substantially constant. Thus, the exchange area can be reduced accordingly and thus the investment costs can be reduced.
Damit erhöhen sich Produktreinheit und/oder Produktausbeute. Bei gleich bleibender oder weniger stark erhöhter Trennwirkung kann die Zahl der theoretischen Böden in der Einzelsäule verringert werden; dadurch werden die Investitionskosten der Anlage vermindert.This increases product purity and / or product yield. If the separation efficiency remains the same or less pronounced, the number of theoretical plates in the single column can be reduced; This reduces the investment costs of the system.
In einer weiteren Ausgestaltung der Erfindung wird das Kühlfluid in Aufwärtsrichtung durch die Verdampfungspassagen geleitet ("Forced Flow"-Verdampfer). Hierdurch ergibt sich wiederum ein besonders günstiger Verlauf der Temperaturen von verdampfendem Kühlfluid und kondensierendem Kopfgas über die Höhe des Kopfkondensators.In a further embodiment of the invention, the cooling fluid in the upward direction through the evaporation passages is directed ("forced flow" evaporator). This in turn results in a particularly favorable course of the temperatures of evaporating cooling fluid and condensing overhead gas over the height of the top condenser.
Vorzugsweise wird das Kühlfluid durch eine sauerstoffangereicherte Fraktion aus dem unteren Bereich der Einzelsäule gebildet.Preferably, the cooling fluid is formed by an oxygen-enriched fraction from the lower portion of the single column.
Die Erfindung betrifft außerdem eine Vorrichtung gemäß Patentanspruch 5.The invention also relates to a device according to
Die Erfindung sowie weitere Einzelheiten der Erfindung werden im Folgenden anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert.The invention and further details of the invention are explained in more detail below with reference to an embodiment schematically illustrated in the drawing.
Atmosphärische Luft 1 wird nach Verdichtung, Reinigung und Abkühlung (nicht dargestellt) unter einem Absolutdruck von 5 bis 10 bar, vorzugsweise etwa 6 bar in die Einzelsäule 2 unmittelbar oberhalb des Sumpfes eingeleitet.Atmospheric air 1 is introduced after compression, cleaning and cooling (not shown) under an absolute pressure of 5 to 10 bar, preferably about 6 bar in the
Der Kopfkondensator 3 der Einzelsäule 2 ist erfindungsgemäß als Rücklaufkondensator ausgebildet. Er besteht in dem Beispiel aus einem einzigen Plattenwärmetauscherblock. Stickstoffreiches Gas vom Kopf der Einzelsäule strömt unten in die Rücklaufpassagen ein (Pfeil nach oben) und wird dort partiell kondensiert. Das dabei erzeugte Kondensat strömt im Gegenstrom zu dem aufsteigenden Gas in den Rücklaufpassagen nach unten (Pfeil nach unten) und wird in der Einzelsäule 2 als flüssiger Rücklauf genutzt. (Ein Teil kann bei Bedarf als Flüssigprodukt abgeführt werden.) Der gasförmig verbliebene Anteil wird am oberen Ende der Rücklaufpassagen über einen seitlichen Header 4 als Druckstickstoffstrom 5 abgezogen und nach Anwärmung in einem nicht dargestellten Hauptwärmetauscher als Druckstickstoffprodukt gewonnen.The
Eine sauerstoffangereicherte Fraktion 6 wird flüssig vom Sumpf der Einzelsäule abgeführt, in einem Drosselventil auf einen Druck von 1,5 bis 4,0 bar, vorzugsweise etwa 2,5 bar entspannt und über einen seitlichen unteren Header 8 in die Verdampfungspassagen des Kopfkondensators 3 eingeleitet, die als Forced Flow-Verdampfer betrieben werden. Die vollständig verdampfte sauerstoffreiche Fraktion 10 wird über einen oberen Header 9 aus den Verdampfungspassagen abgezogen und kann beispielsweise in einer Restgasturbine (nicht dargestellt) arbeitsleistend entspannt werden. Nach Anwärmung im Hauptwärmetauscher (nicht dargestellt) wird sie als Reststrom abgezogen, zur Regenerierung eines Adsorbers zur Luftreinigung eingesetzt oder als sauerstoffangereichertes Produkt genutzt.An oxygen-enriched
Abweichend von dem Ausführungsbeispiel kann der Kopfkondensator bei dem erfindungsgemäßen Verfahren auf der Verdampfungsseite auch als Fallfilmverdampfer oder als Flüssigkeitsbadverdampfer ausgebildet sein (siehe deutsche Patentanmeldung
Ein Rücklaufkondensator in einer der hier genannten Ausführungsformen kann auch als Kopfkondensator einer Säule eines Zwei- oder Mehr-Säulen-Verfahrens zur Stickstoff-Sauerstoff-Trennung eingesetzt werden, beispielsweise als Hauptkondensator einer klassischen Doppelsäule.A reflux condenser in one of the embodiments mentioned herein can also be used as the top condenser of a column of a two or more column nitrogen-oxygen separation process, for example as the main condenser of a classic double column.
Claims (5)
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EP08012055A EP2026025A1 (en) | 2007-07-30 | 2008-07-03 | Process and device for producing high pressure nitrogen by cryogenic separation of air in a single column |
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DE200710035603 DE102007035603A1 (en) | 2007-07-30 | 2007-07-30 | Process and apparatus for obtaining pressurized nitrogen by cryogenic separation of air in a single column |
EP07019209 | 2007-09-28 | ||
EP08012055A EP2026025A1 (en) | 2007-07-30 | 2008-07-03 | Process and device for producing high pressure nitrogen by cryogenic separation of air in a single column |
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2008
- 2008-07-03 EP EP08012055A patent/EP2026025A1/en not_active Withdrawn
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US5144809A (en) * | 1990-08-07 | 1992-09-08 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Apparatus for production of nitrogen |
US6128920A (en) | 1998-03-03 | 2000-10-10 | Kabushiki Kaisha Kobe Seiko Sho | Dephlegmator |
US5899093A (en) * | 1998-05-22 | 1999-05-04 | Air Liquide Process And Construction, Inc. | Process and apparatus for the production of nitrogen by cryogenic distillation |
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EP1890099A1 (en) * | 2006-08-08 | 2008-02-20 | Linde Aktiengesellschaft | Dephlegmator |
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